Water softening is a pretreatment process used to reduce hardness-causing ions, mainly calcium and magnesium, from feed water. Hard water can cause scaling inside RO membranes, heating surfaces, valves, tubing and other purification components.
In laboratory water systems, softening is especially useful when the feed water has moderate to high hardness. It helps protect reverse osmosis membranes and improves the long-term reliability of the purification system.
Water softening primarily reduces:
Traditional softeners do not remove all dissolved salts. Instead, they exchange calcium and magnesium ions with sodium ions. This reduces scaling tendency but does not make the water deionized or ultrapure.
A softener uses ion exchange resin in sodium form. As hard water passes through the resin bed, calcium and magnesium ions are captured by the resin and sodium ions are released into the water.
After the resin becomes exhausted, it is regenerated using a brine solution. The brine replaces the captured hardness ions with sodium again, allowing the softener to continue operating.
Hardness scaling is one of the most common causes of RO membrane fouling. Scale formation reduces permeate flow, increases operating pressure and shortens membrane life. In severe cases, it can permanently damage membranes.
Softening helps reduce this risk. It is especially useful in large systems, high recovery systems and installations where feed water hardness fluctuates seasonally.
Water softening is used in:
TKA Ultrapure Water Technologies India Pvt. Ltd.
Unit 311, Globe Business Park,
Kalyan – Badlapur Road, Laxmi Nagar, Ambarnath (W) 421501
Thane, Maharashtra, India
Phone: +91-9987174888 / +91-9867964888
Email: info@tkaindia.com
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TKA Ultrapure Water Technologies India Pvt. Ltd. is an Indian company focused on the design, manufacture and support of laboratory water purification systems… Read More
